Printing attachment for calculating-machines.



PATENTED SEPT. 15, 1903.

w. H. PI E, JR. PRINTING ATTACHMENT POE CALCULATING MACHINES.

APPLICATION FILED KOV. 21,,1902- 3 SHEETS-SHEET 1.

H0 MODEL.

6 N01 nu a n1: nonms PETERS cu. mowwwnu was" No. 738.934. PATBNTED SEPT. 15, 1903.

w. H. PIKE, JR. PRINTING ATTACHMENT FOR CALCULATING MACHINES.

APPLICATION FILED NOV. 21, 1902.

3 8HEETS-SHEET 2.

H0 MODEL.

- ha k am" up No. 738,984. PATENTED SEPT. 15, 1903. W. H. PIKE, JR. PRINTING ATTACHMENT FOR CALCULATING MAGHINES.

APPLICATION FILED NOV. 21, 1902,

3 SHEETS-SHEET 3.

N0 MODEL.

vsaese. UNITED STATES Patented September 15, 1903.

I PATENT OFFICE.

WILLIAM H. PIKE, JR., OF ST. LOUIS, MISSOURI, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO PIKE ADDING MACHINE COMPANY, OF ST.

LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

PRINTING ATTACHMENT FOR CALCULATING-MACHINES.

SPECIFICATIQN forming part of Letters Patent No. 738,934, dated September 15, 1903.

Application filed November 21, 1902. Serial No. 132,299. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM H. PIKE, Jr., a citizen of the United States, residing at St. Louis, Missouri, have invented certain new and useful Improvements in Printing Attachments for Calculating-Machi nes,of which the following is a specification.

This invention relates to printing attachments for calculating-machines, and particu- IO larly to the devices for supporting and feeding the paper; In machines of this character it is necessary to provide means for feeding the paper over the platen step by step in order to print successive rows of figures,

I5 and it is desirable also to provide means by which the platen and paper may be moved transversely of the machine in order to print parallel columns of figures, and as a refinement of this latter action it is desirable to provide means by which the paper-carriage and platen maybe moved to any desired extent transversely of the machine, so that forms having parallel-ruled columns for figures at varying distances apart may be used on the machine as well as plain sheets of paper.

The invention will be fully described hereinafter, reference being had to the accompanying drawings, in which-- Figure l is aside elevation ofacalculatingmachine embodying my present invention. Fig. 2 is an end view of the paper-carriage, its support being shown in' section. Fig. 3 is a sectional view of the paper-carriage and its 5 support on the line 8 3 of Fig. 5. Fig. 4 is a plan view of the paper-carriage. Fig. 5 is a front view of the same.

Referring to the drawings, it will be seen that a cylindrical platen 880 is mounted on 40 trunnions supported in end plates 800 and 800 forming the ends of a carriage L, slidably mounted on a support 870, fixed to the side frames 070 and 970 The support and carriage are each provided with raceways for 5 antifriction-balls 871, so arranged that when the parts are assembled the carriage will be locked against vertical movement relative to the support, but may move freely lengthwise thereon transversely of the machine. Two

series of pressure-rolls 881 881, mounted on shafts 839 and 831, serve to press the paper to the platen. A metal guide 801 for the paper is fastened to the top of the carriage and passing under the platen 880, is curved around the front of the platen nearly to the printing-point. A swinging paper-guide 802, mounted on the upper pressure-roll shaft 839,

is provided to facilitate the insertion of the paper and is arranged to be thrown back when the machine is in use. Both guide-plates are cut away to permit the presser-rolls to project through them.

The shaft 839, carrying the upper set of presser-rolls, is mounted in two plates 807, pivoted, respectively, to the end plates 800 and SOO and springs 839 tend to press the rolls against the platen. The shaft 831, carrying the lower set of presser-rolls 881, is mounted in two plates 808, also pivoted to the end plates 800 and 800 and springs 831 tend to press these rolls against the platen. The plates 807 and 808 have contacting shoulders, (indicated at 832, Fig. 3,) and each plate 807 has an upwardly-extending finger-piece 807, so that by pressing rearwardly on these fingerpieces both series of presser-rolls 881 and 881 will be simultaneously moved away from the platen for the insertion and adjustment of the paper. When the shoulders pass each other under the influence of continued-8o rearward pressure upon the fin ger-pieces 807 the lower ends of the plates 807 will ride upon the upper edges of the plates 808 and serve as locks to hold both sets of presser-rolls away from the platen. The paper is inserted from the rear of the machine and is guided by the guide-plate 801 under and over the platen and by the guide-plate 802 down over the platen to the guide-strip 834, from which it will pass out at the rear of the machine, as indicated by arrowsin Fig. 3. The guidestrip 834 will conveniently be supported by the plates 807, and said plates and strip constitute a swinging frame. 7

The carriage and platen are movable across 5 the printing zone, and preferably a frictional lock is provided to fasten the carriage in any position that may be required. In the prescut instance this look consists of a rod 822 at the rear of the carriage, extending throughout its length and suitably supported to turn in the end plates 800 and SOO with an eccentric collar 875 rigidly fastened to it and adapted to engage the support 870. The collar acts as a frictional lock when the rod is turned by the crank-arms 806, Fig. 4, on its ends to cause the collar to exert pressure on the support 870, and the friction thus created between the collarand support will be suffioient to hold the carriage against lengthwise movement.

It will be seen that through the agency of the above-described mechanism the carriage and platen may be adjusted transversely of the machine to any desired point by simply releasing the friction-lock and sliding the carriage lengthwise by hand, and thus paper having ruled columns for figures can be accurately adjusted, so that the printing will take place at the right positions in such columns.

The platen is suitably rotated step by step, as by a train of gears 886, 887, and 888, supported by theleft-hand end plate. (See Figs. 1 and 4.) The rear gear 886 has a ratchetwheel 885 rigidly fixed to it, and motion is given to the ratchet-wheel by a pawl 812, attached to aswinging arm 804, Fig. 2, supported on the stud, upon which the gear 886 turns. This arm receives motion from a slotted arm 809, rigidly fastened toa rock-shaft 820, which has bearings in the two end plates 800 and SOO This shaft has a keyway 820, Fig. 3, extendingsubstantiallythroughoutitslength, and it passes through a sleeve 810*, which is held against sidewise movement in the bottom of the fixed carriage-support by projections on said support, and this sleeve has a key 810 projecting into the groove in the shaft, so that while the shaft may slide endwise through the sleeve the rod will be oscillated with the sleeve. An arm 810 is fixed to the sleeve and projects downwardly through a slotted opening 870 in the support 870 and is connected by-a link 811 to an oscillating part of the machine which moves back and forth once at every operation of the machine.

When the machine is operated, the first movement of the link 811 will be in the direction of the arrow, Fig. 3, which movement will rock the grooved shaft 820 and cause the arms 809 and 804 to oscillate and draw the pawl 812 backwardly over the ratchet. The returning movement of the main link 811 moves the ratchet positively through the above-named connecting devices, thereby advancing the paper at the printing-point. At the termination of the working stroke of the pawl a toe 812 of the pawl, Fig. 2, contacts with a stud 815 on the end plate SOO which lifts the pawl clear of the ratchet-wheel and allows the platen to be turned forward or backward by hand when the machine is at rest, the platen being provided with milled knobs 880 for this purpose. The pawl has also a finger 812 arranged to pass under and contact with a stud 830 on a movable arm 805 when the pawl is being drawn backwardly over the ratchet, which results in then lifting the pawl out of contact with the ratchetwheel. On the forward or operative movement of the pawl it will not engage the ratchetwheel until it passes from the stud 830, and the stud and arm may be set in varying positions, so that the extent of the feeding stroke of the pawl may be varied to vary the feed motion of the platen.

Without limiting myself to the precise details of construction illustrated and described, I claim 1. The combination of a fixed support, a paper-carriage movable thereon to carry the paper to different positions laterally, a platen on the carriage movable to feed the paper step by step longitudinally, and a locking device for securing the carriage in its lateral position while permitting the free rotation of the platen, substantially as set forth.

2. The combination of a fixed support, a paper-carriage mounted on said support to have longitudinal but not vertical movement thereon, a shaft supported to turn in said carriage, and an eccentric collar rigid on the shaft to engage said support, substantially as set forth.

3. The combination of a fixed support, a paper-carriage slidably supported thereon, a platen supported to turn in the carriage, a ratchet-and-pawl mechanism for turning the platen, an oscillating shaft 820 supported by the carriage and connected to the pawl, said shaft having a longitudinal keyway, a collar supported in the fixed support against lateral movement and having a lug or key projecting into said keyway, an arm on the collar projecting through a slotted opening in the fixed support, and means for oscillating said arm, substantially as set forth.

4. The combination with a platen, of two shafts each carrying presser-rolls 881, two pairs of swinging plates in which the shafts are respectively mounted, and the plates of one pair having shoulderswhich engage with shoulders on the plates of the other pair, springs connected to said plates and to a fixed pointand normally tending to hold the presserrolls against the platen, and finger-pieces on one pair of plates whereby the interlocking shoulders may be disengaged and the presserrolls held out of engagement with the platen, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM H. PIKE, JR.

WVitnesses:

ARTHUR PENTECOST, BYRON E. BROWN. 

